Standardized SEGD

MIDI is a SEGD field data copy system providing the necessary tools to update your SEGD library. It has
long been recommended that digital data libraries be refreshed on a regular basis with the figure of 10
years often mentioned. MIDI provides the opportunity to input the various historic versions of SEGD
and output standard SEGD 2.1
The SEGD 2.1 format was recently ratified by the SEG Technical Standards Committee to improve
support for high capacity media such as the IBM3592. The main aim was to allow recording of multiple
lines on a tape by use of a line sequence number.

• Windows NT, 2000, XP, Vista
• Linux, Solaris
• Standard SCSI tape devices
• High Capacity Drive
• ConnectivityTransfer at Near Theoretical
• MaximumPortable C++ portable code
• Graphical User Interface
• Output standard SEGD 2.1
• Multiple lines sequenced in SEGD 2.1
• Multiplexed SEGD to Demultiplexed SEGD 2.1
• Support for tape robots and libraries
• QC listing of data/media transfer

Troika has developed a highly efficient SEGD copy utility MIDI. MIDI provides the necessary tools to
standardize your SEGD library and transfer data from low‐density, typically 9 track, 3480/3490 or 3590
to high capacity media such as 3592. This package embraces the new SEGD 2.1 format which records a
sequence number for each seismic line within a survey so that multiple lines may be written to tape.

Connectivity

MIDI can be interfaced to any standard SCSI devices via IBM/Windows drivers and “off‐the‐shelf”
controllers including; 9‐track, 3480, 3490, 3490E, 3590, 3592, Exabyte 8200, 8500, 8505, 8700, DLT, DAT,
DVD, CD etc. Multiple drives may also be attached and run as separate job streams to increase
throughput. MIDI includes support for a number of robotic devices including IBM3494 and STK9710.
Customized uploading of metadata to databases via XML.

<?xml version="1"?>
-<segd21-tape vsn="123456">
-<line id="line01" seq="1">
-<segd-image file="714173.tap" />
-<segd-image file="714173.tap" />
-<segd-image file="714173.tap" />
</line>
</segd21-tape>

Listing

A number of lists are created whilst transcription is being carried out, which may be used for quality
assurance purposes, saving to disk, printout etc. These lists include details of the data that has been
read from and written to tape providing a machine‐readable listing for import to a database, spread
sheet for labeling or documentation such as transmittals.